Conveyer



'; -W. GUST.

CONVEYER.

APPLICATION man MAR. 25. 1920.

1,433,3 I- Patented Oct. 24, 1922.

attained, will ing descriptlon.

rait aa on. aw, ieaa.

CONVEYER.

Application filed March 25, 1920.

provements in the formation and operation more specifically to of conveyors, and relates improvements in the construction of rotary screw conveyers of the type especially adapted to transport granular or pulverulent material along a conduit or trough.

An object of the invention is to provide a screw conveyor which is simple in construc tion and efficient in operation. Another object isto provide a screw conveyer the helical flight of which is formed in sections which are readily adjustable to reverse the direction of transportation of the material being acted upon. Still another object is to provide means for facilitating the construction and adjustment of sectional screw con veyers of the reversible type. A further objectis to provide a sectional screw con-. veyer which maybe formed of sheet metal and. with the aid of dies, thereby enabling construction of the conveyor sections in quantity and at minimum cost. A. further object is to provide a screw conveyor in which the successive sections are of identical formation, thus making the various similar parts interchangeable. Another object is to provide simple and eflicient means for attaching the flight sections of a screw conveyer to the central drive element thereof, such securingmeans also permitting removal of the flight sections from the drive elements. These and other objects of the invention and the manner in which. they are be apparent from the followclear conception of several embodiments of the invention maybe had by referring to thedrawing accompanying and forming a.

part of this specification, in which like ref erence characters designate the lar partsin the various views. i

Fig. l is a side elevation of several successive sections of a screw conveyor showing the fligl'it sections detachably associated llflilwaultee and State of same or simi,

Serial No. 369,396.

with the central driving element of the conveyer.

Fig. 2 is an end shown in Fig. 1.

Fig. 3 is a bottom view of disclosed in Figs. l and 2.

Fig.4 is a side elevation of another form of sectional screw conveyor, showing several successive sections thereof each having a flight-section detachably associated with a central driving element.

*ig. 5 is an end view of the conveyor shown inFig. 4. Fig- 6 is a top view in Figs. 4 and 5.

ig. 7 isa plan view sectional central drive view of the conveyor the con veyc r of the conveyer shown of another form of member for a screw oonveyer, showing two successive sections thereof.

Fig. 8 IS an enlarged transverse section through the fastening means for attaching a flight section to the central drive member, the section being taken along the line VIII-VIII of Fig. 7."

The screw conveyor element to which the present invention relates, comprises in general a central driving shaft ordinarily consisting of a piece of pipe i, a series of end coacting tubular members 3,. 30, 31 emracing and secured. to the pipe Ii, and. a se ries of reversely positioned flight sections or blades 2 associated. one with each ofthe tubular nleinbers .3, 80, 31 and forming a sub stantially continuous helical flight extending longitudinally of the pipe lllis ctmveyer element forms the 'otor of the conveyor and is disposed within a stationar'r trough or conduit the walls ofwhich are located adj acent to th formed by the blades 2. As this rotor caused to revolve within the conduit or trough, material admitted to the path of the helical flight, will be transported from end to end of the. conveyer, the direction of transportation depending upon the setting of the blades 2 and the (llIGtlOIl ofrotation of the rotor" In the forms of conveyer disclosed in metrically opposite end projections 15 adapted to engage similarly formed recesses e periphery of the helical flight 18 in the ends of the adjacent members 3, 30 respectively, in order to properly relatively osition the successive tubular members. *ach of the tubular members 3, 30 is constructed of a substantially rectangular sheet metal blank which after being properly punched and distorted, is rolled into tubular shape and has its abutting ends 0011- nected by means of spot welds at the overlapping projections 14 which are provided for such connection. Each of the tubular members 3, is also provided with a distorted portion forming a hollow boss 11 within which is located a nut 12-. The members 3, 30 after being positioned upon the pipe 4. as illustrated, are locked in position by means of set screws 13 co-operating with the nuts 12 in the bosses 11. The successive members 3 are identical in construction, as are also the successive members 30.

Referring specifically to Figs. 1, 2 and 3, the sheet metal tubular members 3 are each provided with a set of inner parallel ears 9 extending substantially perpendicular to the longitudinal axis of the member 3, these cars being formed by punching out and distorting the body of the tubular member 3 at the openings 16. Each of the tubular members 3 is further provided with two sets each comprising a pair of parallel outer ears 5, extending at oblique angles relatively to the axis of the tubular member 3. These ears 5 are formed by punching out and distorting the body of the tubular member 3 at the openings 8. The ears 5, 9 form oppositely facing definitely spaced abutments adapted to engage and to position the blades 2; The blades 2 are likewise formed of sheet metal of substantially semi-circular formation and having their inner portions cut away to engage the tubular members 3. The sheet metal blades 2 are interchangeably associable with the sets of ears 5 as shown. in full and dot and dash lines in Fig. 1. With a blade 2 properly positioned, the end portions coact with the-abutments formed by the ears 5 while the medial portion of the blade lies between the abutments formed by the ears 9 The cars 9 and the adjacent medial portion of the blade 2 are provided with alined openings within which is located a clamping screw 7. Associated with the clamping screw 7 is a nut 17 which in conjunction with the screw 7 is adapted to draw the ears 9 inwardly toward the blade 2 and to hold the blade 2 firmly in position. The successive sections of the conveyer are of identical structure but are angularly advanced 180 relatively to each. other about the axis of the pipe 4. Vith the blades 2 positioned as shown in full lines in Fig. 1, rotation of the conveyer in a given direction will advance the material in a predetermined direction longitudinally of the pipe l. 'With the blades positioned as shown in dot and dash lines in Fig. 1, 1'0- tation of the conveyor in the same direction will urge the material in the opposite direction longitudinally of the pipe 4;.

Referring specifically to Figs. 4, 5 and 6, the sheet metal tubular members 30 are each provided with diametrically opposite sets oi inner parallel cars 19 extending substantially perpendicular to the longitudinal axis oi? the member 30, these cars being formed by punching out and distorting the body of the tubular member 30 at the open ings 26. Each of the tubular members 30 is further provided with a set ol diametrically opposite parallel outer ears extend ing at right angles relatively to the axis of the tubular member 30. Tlhcse cars 25 are formed by punching out and distorting the body of the tubular member 30 at the openings 28. The cars 19, 25 again .l'orni oppo-- sitely facing definitely spaced blade positioning abutments. The blades 2 are identical with those disclosed in Figs. 1 to 3 inclusive and are interchangeably associal'ile with opposite ends of the ears 25 and with the diametrically opposite sets of inner cars 19. With a blade 2 properly positioned to transport material in one direction for a given direction of rotation, the end, portions of the blade roact with cmircsponding halves of the ears 25 and the medial portion of the blade lies between the set of cars 19 on the side of the tubular member $30 adjacent to the halves of the ears :25 which are engaged. YVith the blade 2 properly positioned for urging n'iaterial 1n the opposite direction for the same direction o'li rotation, the end portions of the blade LOill'l. with the opposite corresponding halves of the cars 25 while the medial portion of the blade lies between the diametrically oppo site cars 19. The medial portion oi: thrblade 2 is )rovided with an opening which with the b ade properly positioned between a set of ears 19, is in alinement with open ings in the ears 19. These alined openings are again adapted to receive a. elan'iping screw 7 which co-operating with a nut 17 is adapted. to draw the cars 19 inwardly toward the blade and to hold the blade firmly in position. As in the preceding case. the successive tubular members of the conveyor are identical in structure, being; again angularly advanced 180 relatively to earn other about the axis of the pipe 4;.

Referring specifically to Figs. 7 and 8 the sheet metal tubular lllGlllliOlS ill have their ends cut at oblique angles relatively to the longitudinal axis of the members. Each of the tubular mei'nliers 31 is providwl with diametrically opposite parallel cars 19 formed integral with the inliula r momhori and parallel to the ends thereof. The ('on veyer blades 2 are adapted to lit between the ends oi the successive members ii and l. l l) may leeclamped in position by nicans of clampingscrews 7 passing through alined openingsin vthe ears 239i and inthe blade 2; With thisiorm of tubular member 31 itjis unnecessaryto provide the p j jection and the loclring set sc -e the successivetubularmembers 31 a matically, held againstend displacement by are likewise provided. with cars toward oi the several produces aneilicientjlockbetween the tube thetnbe in sections or to provide a the clamping screws Twhich lock the blades '2 in place. The blade 2 may be readily adusted to reverse the direction of transportatlon oi the materlahby merelv associatino the same with. the diametrically oppositr-i en port oinl of the tubular nenzliors 3 1, which 39 for permitting attachment of the blade in weversed position v By referring specifically to ill b, t will be obvious that with the alined openingsin the cars 39 and the; blade 2 formed of such size to permit only i'ree insertion of the clamping screw/7, distortion of the ears the blade 2 w ll cause the axis of the bolt 7 to, move inwardly toward the tubular members 31 thus drawing the conveyor blade inwardly toward the tubular members and urging; the inner edge of the blade 2 against the pipe 4-. l his'sameactionrcsults in, each modifications disclosed and lar members and the bladeu The distortion of the ears 9,

locking, medium for preventing unscrewing of the nuts.

flt willbe noted that in eachorf the several modifications, the tubular members3,30, blades Qare formed oi sheet completely constructed a well asthe metal andmay be with dies. While-n,

iSyIlOt essential to form separate pipe 4, such structure adds flexibility totho conveyor. Similar elements are identical in form and structure and are therefore interchangeable. The fastening means for lock ing the blades 2 to the tubularmembers, are

in each'instance manipulable from the blade side of the tubular member and the blades 2 may be readily removed and resecured to the tubular members in order to reverse the direction of thetransportation of the mate-- aria-l. i .r l j j i It should be understood that it is not de sired to limit the invention to the exact details of construction herein uspaced her, a

shown and described, for various modifications within the scope oi. the appended claims may occur to persons skilled inthe art. v I I It claimed and desired to secure by Letters Patent:

1. In combination, a member, a pair of? blade associable with said 1 on ingz; prore auto for distorting said For distor 1 9, 39 moreover serves qto preventdlsplacement of the nuts 17, the spit-111g; in the materlal forming the ears, acting as a r r jections extending projections associated withysaid merit,

member ad-- j accnt to said piojections, and means tor (ll-S- tortingsaid projections to urge said blade towardsaid membeix, i

2. in combination, a member, a pair oi.

spaced projections associated with said meme ber, ablade associable with tween said projections, said said blade having alined openings therein, and means extending throughsaid openings said member be} pro ect ons and blade toward said mel'nber.

3; in combination, a member, a pair oi" projections associated with blade associable with said ions, and means ting said. projections to urge said spaced fletiible said mei'nber, a member between sa'l d pro ect blade toward. said member.

I 4:. In con'ibination, a inenibei', al'pair'ol,"

spaced flexible projections associlu. l with said member, a blade associablc with said member between said projections, said projections and said blade having alined open ings therein, and means within said ings for distorting said projections to urge said blade toward said member. s j i I 5. In combination, a member, a projection associated with said member, a oiable with projection, and means for distorting said pro ection to urge said blade toward said member,

associated with said member, a blade associable with said member adjacent to said projection, said projection and said blade having alined openings therein, and means it within said openings for distorting said projection to urge said blade toward said mein- "Zr in combination, a sheet having a portion of thegbbdy thereol distorted to form, a projection, a blade associable with said member adjacent to said projection, and means for distorting said pro ection to urge said bladetoward said member.

8. in combination, a sheet metal member liming a portion of the body thereof dis with said member between said projections,

and means co-operable with said projections andsaid blade to distort said projections and tonrge said blade toward said member.

10. lln combination, a member having a pair of spaced parallel projections and a second pa-ir of remotely separated substanprojections to urgesaid open:

blade asso-Q said member ad acent to said 1 i v i 6. In combinat ioma member, a projection metal member pro ections and urge said blade parallel spaced projections tially parallel projections extending at an oblique angle to said first mentioned projections, a blade associable with said mem ber adjacent to said first mentioned projections and engageable with said second mentioned projections, and means co-operable with said first mentioned. projections and with said blade to retain said blade in engagement with said second mentioned projections.

l1. In combination, asheet metal member having its body distorted to form a pair of and a second pair of parallel projections extending at an oblique angle to said first mentioned projections, a plane blade associated with said member adj acent to said first mentioned projections and cngageable with said second mentioned projections, and. means co-operable with said first mentioned projections and with said blade to retain said blade in engagement with said second mentioned projections.

12. In combination, a member having pair of longitudinally spaced projections and a second pair of laterally spaced projections a blade associable with said member adjacent to said longitudinally spaced projections and engageable directly with said laterally spaced projections, and means co-operable with said longitudinally spaced projections and said bladein engagement with spaced projections.

13. In combination, a member having a pair of longitudinally spaced projections and a second pairof laterally spaced projecsaid laterally tions located on opposite sides of longitudinally spaced projections, a blade reversibly associable with said member at said projections, and means co-operable with said prowithsaid blade to retain jections and said blade to retain said blade in engagement with said laterally spaced projections.

14. In combination, a tubular member having a pair of longitudinally spaced pro j ections and a second pair of: laterally spaced projections all located on the same side of said tubular member, a semi-circular blade associable with said projections, and means co-operable with said longitudinally spaced projections and said blade to retain said blade in engagement with said laterally spaced projections.

15. In combination, a tubular sheet metal member having its body distorted lo lorm a pair of longitudinally spaced jLl'(,lj!-ill(lllt-i lying in planes perpemlienlnr to lb, axis of said membe' and other projeriions extending obliquely relativelv lo said axis, :1 blade associable with said member between said perpendicular projections and engagenble directly with said oblique projections, and means co-operable with said perpein'licular projections and said blade to retain. said blade in engagement with said oblique pro-- jections.

16. In combination, a member having an axis and a pair of spaced projections perpendicular to said axis, said member having two sets of other projections extending at oblique angles relatively to said axis, a blade associable with said member adjacent to said perpendicular projections and interchangeably engageable with said sets of oblique projections, and means co-operable with said perpendicular projections and said blade to retain said blade in engagement with either set of said oblique projections. In testimony whereof, the signature oi the inventor is aiiiXed hereto.

WALTER GEIST. 

